Amusement parks can be fun, but amusement parks deep underground? Even better. Located in a salt mine that dates back centuries and was abandoned in 1932, Salina Turda is one of the more interesting attractions around. Inside this cavernous space, you'll find a ferris wheel-style attraction with gondolas — made possible by the 160-feet ceilings — a putt-putt course, mini bowling lanes, an area dedicated to sports, billiard tables, 4 table tennis courts, a 180-seat amphitheater, a children's play area, and an underground lake with boat rentals. Looking for something more than just a good time? The mine's microclimate also provides natural therapy for those suffering from respiratory issues. Oh, and if that wasn't enough, it's also located in a rather notorious region known as Transylvania — so if you happen to see any bats, be careful.